#include <stdio.h>
#include <stdlib.h>
#include <time.h>
int main()
{
    int a,b;
    srand ((size_t)time(NULL));
    a=rand()%1000;
    printf ("猜一个3位数");
    scanf ("%d",&b);
    for (;b!=a;scanf ("%d",&b)) {
        if (b<a)
    }
    return 0;

    
}